Outdoor post lamp



FIG. 1 is a perspective view of an outdoor post lamp showing my new design;

FIG. 2 is a front elevational view of the outdoor post lamp, the right side, left side and rear elevational views being identical;

FIG. 3 is a top plan view of the outdoor post lamp; and,

FIG. 4 is a bottom plan view of the outdoor post lamp. 

The ornamental design for an outdoor post lamp, as shown and described. 